feat(filters): add police number filter

packages/components/src/filters/balPoliceNumber.spec.ts

@@ -0,0 +1,16 @@
+import { balPoliceNumber } from './balPoliceNumber'
+
+describe('balPoliceNumber', () => {
+  test('should format a claim number correctly', () => {
+    expect(balPoliceNumber('501222333')).toBe('50/1.222.333')
+  })
+  test('should format null as empty string', () => {
+    expect(balPoliceNumber(null)).toBe('')
+  })
+  test('should output a number with a wrong format raw', () => {
+    expect(balPoliceNumber('123')).toBe('123')
+  })
+  test('should format a claim number with a sign postfix correctly', () => {
+    expect(balPoliceNumber('0501222333')).toBe('50/1.222.333')
+  })
+})

packages/components/src/filters/balPoliceNumber.ts

@@ -0,0 +1,21 @@
+/**
+ * Transforms the given string into the correct police-number format.
+ *
+ * ```typescript
+ * balPoliceNumber('501222333') // 50/1.222.333
+ * ```
+ */
+export function balPoliceNumber(value: string | undefined | null | number): string {
+  if (!value) {
+    return ''
+  }
+  let newValue = `${value}`
+  if (newValue[0] !== '0') {
+    newValue = `0${value}`
+  }
+  const parts = [newValue.substring(1, 3), newValue.substring(3, 4), newValue.substring(4, 7), newValue.substring(7, 10)].filter(val => val.length > 0)
+  if (!parts || parts.length < 4) {
+    return `${value}`
+  }
+  return `${parts[0]}/${parts[1]}.${parts[2]}.${parts[3]}`
+}